通常来说，一张EP的音乐时长大约是10到28分钟，单曲不超过10分钟，而专辑一般都会容纳30到80分钟的音乐。
Usually, an EP has around 10-28 minutes of music, a single has up to 10 minutes, and an album generally has 30-80 minutes.
研究证明，四名被试经可视音乐治疗后，音调、响度、语句时长控制这三个方面均有了极其显著的进步。
Research shows that they get an extremely significant progress on pitch, loudness, length of sentences after visual music therapy.
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